Title (fr)

Publication

Application

Priority

DE 19549032 A 19951228

Abstract (en)

[origin: EP0781761A1] Purification of crude N,N'-diphenyl-p-phenylene diamine (DPPD) comprises extracting crude DPPD with hydrocarbon(s), passing the extract through an adsorption layer and recovering purified DPPD from this solution. Also claimed is apparatus used for purifying DPPD.